2004 Lexus ES 330FACTORY OEM SERVICE PROCEDURE

Generators & Regulators: Precaution

  1. System Initialization

    When disconnecting the negative battery terminal, initialize the following systems after the terminal is reconnected.
    SYSTEMS TO INITIALIZE

    System Name Go To
    Power Window Control System PRE-CHECK
    Sliding Roof System RESET
  2. Check that the battery cables are connected to the correct terminals.
  3. Disconnect the battery cables if a quick charge is given to the battery.
  4. Do not perform tests with a high voltage insulation resistance tester.
  5. Never disconnect the battery while the engine is running.
  6. Check that the charging cable is tightened on terminal "B" of the generator and the fuse box.
  7. Do not check whether the alternator generates current or not with terminal "F" connected to the other terminals.
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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